File: alien-glow-logo.scm

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;  ALIEN-GLOW
;  Create a text effect that simulates an eerie alien glow around text

(define (apply-alien-glow-logo-effect img
				      logo-layer
				      size
				      glow-color)
  (let* ((border (/ size 4))
	 (grow (/ size 30))
	 (feather (/ size 4))
	 (width (car (gimp-drawable-width logo-layer)))
	 (height (car (gimp-drawable-height logo-layer)))
	 (bg-layer (car (gimp-layer-new img
					width height RGB-IMAGE
					"Background" 100 NORMAL-MODE)))
	 (glow-layer (car (gimp-layer-new img
					  width height RGBA-IMAGE
					  "Alien Glow" 100 NORMAL-MODE))))

    (gimp-context-push)

    (gimp-selection-none img)
    (script-fu-util-image-resize-from-layer img logo-layer)
    (gimp-image-add-layer img bg-layer 1)
    (gimp-image-add-layer img glow-layer 1)
    (gimp-layer-set-preserve-trans logo-layer TRUE)
    (gimp-context-set-background '(0 0 0))
    (gimp-edit-fill bg-layer BACKGROUND-FILL)
    (gimp-edit-clear glow-layer)
    (gimp-selection-layer-alpha logo-layer)
    (gimp-selection-grow img grow)
    (gimp-selection-feather img feather)
    (gimp-context-set-foreground glow-color)
    (gimp-edit-fill glow-layer FOREGROUND-FILL)
    (gimp-selection-none img)

    (gimp-context-set-background '(0 0 0))
    (gimp-context-set-foreground '(79 79 79))

    (gimp-edit-blend logo-layer FG-BG-RGB-MODE NORMAL-MODE
		     GRADIENT-SHAPEBURST-ANGULAR 100 0 REPEAT-NONE FALSE
		     FALSE 0 0 TRUE
		     0 0 1 1)

    (gimp-context-pop)))

(define (script-fu-alien-glow-logo-alpha img
					 logo-layer
					 size
					 glow-color)
  (begin
    (gimp-image-undo-group-start img)
    (apply-alien-glow-logo-effect img logo-layer size glow-color)
    (gimp-image-undo-group-end img)
    (gimp-displays-flush)))

(script-fu-register "script-fu-alien-glow-logo-alpha"
		    _"Alien _Glow..."
		    "Create an X-Files-esque logo with the specified glow color"
		    "Spencer Kimball"
		    "Spencer Kimball"
		    "1997"
		    "RGBA"
                    SF-IMAGE      "Image"                   0
                    SF-DRAWABLE   "Drawable"                0
		    SF-ADJUSTMENT _"Glow size (pixels * 4)" '(150 2 1000 1 10 0 1)
		    SF-COLOR      _"Glow color"             '(63 252 0))

(script-fu-menu-register "script-fu-alien-glow-logo-alpha"
			 _"<Image>/Script-Fu/Alpha to Logo")


(define (script-fu-alien-glow-logo text
				   size
				   font
				   glow-color)
  (let* ((img (car (gimp-image-new 256 256 RGB)))
	 (border (/ size 4))
	 (grow (/ size 30))
	 (feather (/ size 4))
	 (text-layer (car (gimp-text-fontname img
					      -1 0 0 text border TRUE
					      size PIXELS font)))
	 (width (car (gimp-drawable-width text-layer)))
	 (height (car (gimp-drawable-height text-layer))))

    (gimp-image-undo-disable img)
    (gimp-drawable-set-name text-layer text)
    (apply-alien-glow-logo-effect img text-layer size glow-color)
    (gimp-image-undo-enable img)
    (gimp-display-new img)))

(script-fu-register "script-fu-alien-glow-logo"
		    _"Alien _Glow..."
		    "Create an X-Files-esque logo with the specified glow color"
		    "Spencer Kimball"
		    "Spencer Kimball"
		    "1997"
		    ""
		    SF-STRING     _"Text"               "ALIEN"
		    SF-ADJUSTMENT _"Font size (pixels)" '(150 2 1000 1 10 0 1)
		    SF-FONT       _"Font"               "Sans Bold"
		    SF-COLOR      _"Glow color"         '(63 252 0))

(script-fu-menu-register "script-fu-alien-glow-logo"
			 _"<Toolbox>/Xtns/Script-Fu/Logos")